Nathan H Minneapolis , MN August 05, 2015 Appliance: Thermador PRG304US Thermador Prg304us: Oven shutting off or flame fluttering. How to replace Oven Burner Igniter. Replaced igniter. Only problem was a stuck screw on the old igniter, which WD40 took care of. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes